remove deprecated python_venv alias

pre_commit/all_languages.py

@@ -44,7 +44,5 @@ languages: dict[str, Language] = {
     'script': script,
     'swift': swift,
     'system': system,
-    # TODO: fully deprecate `python_venv`
-    'python_venv': python,
 }
 language_names = sorted(languages)

pre_commit/repository.py

@@ -3,7 +3,6 @@ from __future__ import annotations
 import json
 import logging
 import os
-import shlex
 from collections.abc import Sequence
 from typing import Any
 
@@ -68,14 +67,6 @@ def _hook_install(hook: Hook) -> None:
     logger.info('Once installed this environment will be reused.')
     logger.info('This may take a few minutes...')
 
-    if hook.language == 'python_venv':
-        logger.warning(
-            f'`repo: {hook.src}` uses deprecated `language: python_venv`.  '
-            f'This is an alias for `language: python`.  '
-            f'Often `pre-commit autoupdate --repo {shlex.quote(hook.src)}` '
-            f'will fix this.',
-        )
-
     lang = languages[hook.language]
     assert lang.ENVIRONMENT_DIR is not None